import {ChapterContext, ChapterContextProps} from "@/context/ChapterContext";
import {EditorContext, EditorContextProps} from "@/context/EditorContext";
import React, {useContext, useEffect, useState} from "react";
import {BookOpen, ChevronRight, FileText, Pilcrow, Type} from "lucide-react";
import IconLabel from "@/components/ui/IconLabel";
import {useTranslations} from '@/lib/i18n';
import {AlertContext, AlertContextProps} from "@/context/AlertContext";
import {BookContext, BookContextProps} from "@/context/BookContext";
import {chapterVersions} from "@/lib/constants/chapter";

export default function ScribeFooterBar() {
    const t = useTranslations();
    const {chapter}: ChapterContextProps = useContext<ChapterContextProps>(ChapterContext);
    const {editor}: EditorContextProps = useContext<EditorContextProps>(EditorContext);
    const {errorMessage}: AlertContextProps = useContext<AlertContextProps>(AlertContext);
    const {book}: BookContextProps = useContext<BookContextProps>(BookContext);

    const [wordsCount, setWordsCount] = useState<number>(0);
    const [paragraphCount, setParagraphCount] = useState<number>(0);

    useEffect((): void => {
        getWordCount();
    }, [editor?.state.doc.textContent]);

    function getWordCount(): void {
        if (editor) {
            try {
                const content: string = editor.state.doc.textContent;
                const texteNormalise: string = content
                    .replace(/'/g, ' ')
                    .replace(/-/g, ' ')
                    .replace(/\s+/g, ' ')
                    .trim();
                const mots: string[] = texteNormalise.split(' ');
                const wordCount: number = mots.filter(
                    (mot: string): boolean => mot.length > 0,
                ).length;
                setWordsCount(wordCount);
                
                let paragraphs: number = 0;
                editor.state.doc.descendants(function (node): void {
                    if (node.type.name === 'paragraph' && node.textContent.trim().length > 0) {
                        paragraphs++;
                    }
                });
                setParagraphCount(paragraphs);
            } catch (e: unknown) {
                if (e instanceof Error) {
                    errorMessage(t('errors.wordCountError') + ` (${e.message})`);
                } else {
                    errorMessage(t('errors.wordCountError'));
                }
            }
        }
    }
    
    function getVersionLabel(): string {
        if (!chapter) return '';
        const version = chapterVersions.find(function (v) {
            return v.value === chapter.chapterContent.version.toString();
        });
        return version ? t(version.label) : '';
    }

    return (
        <div className="px-5 py-2 bg-tertiary text-text-secondary flex justify-between items-center text-xs">
            {/* Gauche : Breadcrumb */}
            <div className="flex items-center gap-1.5">
                {book ? (
                    <>
                        <BookOpen className="w-3 h-3 text-muted" strokeWidth={1.75}/>
                        <span className="text-text-primary font-medium">{book.title}</span>
                        {chapter && (
                            <>
                                <ChevronRight className="w-3 h-3 text-muted" strokeWidth={1.75}/>
                                <span>{chapter.title}</span>
                                <ChevronRight className="w-3 h-3 text-muted" strokeWidth={1.75}/>
                                <span className="text-primary">{getVersionLabel()}</span>
                            </>
                        )}
                    </>
                ) : (
                    <span className="text-text-dimmed">{t('scribeFooterBar.madeWith')} ERitors</span>
                )}
            </div>
            {/* Droite : Stats */}
            {(chapter || book) && (
                <div className="flex items-center gap-4">
                    <IconLabel icon={Type}>{wordsCount} {t('scribeFooterBar.words')}</IconLabel>
                    <IconLabel icon={FileText}>{Math.ceil(wordsCount / 300)} {t('scribeFooterBar.pages')}</IconLabel>
                    <IconLabel icon={Pilcrow}>{paragraphCount} {t('scribeFooterBar.paragraphs')}</IconLabel>
                </div>
            )}
        </div>
    );
}